Decoded image

Decoded image, a part of algorithm transparency, is the original fingerprint image
used for feature extraction (template construction). Decoded image contains unchanged pixels as deserialized by SourceAFIS
except that pixel values are mapped to floating-point range between 0 and 1.
It is an input to image scaling.

Keyword

Suffix

Zip

decoded-image

.json

001-decoded-image.json

decoded-image

.dat

002-decoded-image.dat

Visualization

The following fingerprint image can be reconstructed from this stage's binary data.
Visualization itself is not part of transparency data.

Original fingerprint image as decoded by SourceAFIS.

Binary data

Image size can be obtained from dimensions field in the associated json data, height first.
Binary data consists of rows of pixels ordered from top to bottom.
Every row consists of pixels ordered left to right.
Every pixel is a 64-bit IEEE754-encoded big-endian floating-point number in range from 0 (white) to 1 (black).